Member Since: 28 Jun 2019
Location: London/Cotswolds
Posts: 903
CAI Tachometer Problem
I’ve had a CAI Td5 tacho fitted for a few months. It initially needed the switches at the back fiddling with to get it to read correctly. It was then perfect until two weeks back.
After swapping the rotary oil filter housing, I cranked the engine over a few times to get oil into the new filter without starting up.
When I went to drive off in the 90 later on, I noticed the tacho was way off. It was reading high and the indicated idle would read higher on the gauge every time I stopped. Eventually, I pulled over and had a poke around the back of the gauge. It then started reading correctly for the rest of the journey and my next journey.
My most recent journey saw the gauge play up again. Please see the photos attached to see what’s happening. When I was doing 70mph (should be around 2,600rpm with my tyres/gears) it was reading off the gauge where 6,000rpm would be!
Any ideas on the cause and fix? Is it going to be a new gauge job?
1958 Series 2 88 Pastel Green (2019 LR Legends Best Restored)
1983 V8 110 Limestone (Previously owned by Tom Sheppard MBE)
2004 Td5 90 Santorini Black (Td5INSIDE Powered & Rebuilt by CSK)
2012 Puma 110 Zermatt Silver (Overlanding Build)
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